In another thread, someone mentioned DNA testing as a reliable way of learning about one's ancestry. They provided a link to a website that advertised DNA testing. I've always been curious and have thought about having DNA testing done, but I need to have someone explain it to me like I'm 6.

Here's what the website said:

Y-DNA - Universal Male Test, starting at $119. Males can test their Y-DNA to determine the origin of their paternal line. Note that the Y-DNA test strictly checks the paternal line, with no influence from any females along that line. Females do not receive Y-DNA, and therefore females cannot be tested for the paternal line. If you are a female and would like to know about your paternal line, you would need to have a brother or a male relative from that line tested.

Keeping in mind, I'm a male, again, talk to me like I'm 6. What exactly does this mean?